st: New version of -estadd- available from SSC

Thanks to Kit Baum, a new version of the -estadd-
package is available from the SSC archive.
-estadd- may be used to add various additional
results to (stored) estimates. To install the
update, type
. adoupdate estadd, update
or
. ssc install estadd, replace
The most important change is that -estadd- has a
new syntax. Old -estadd- syntax came in two
versions, which was confusing, I think. The new
syntax is:
estadd <function> [, <options> ] [ : <namelist> ]
where <function> determines the results to be added
and <namelist> provides names of stored estimates
to be modified.
Examples:
. estadd mean
adds a matrix containing the sample means of the
regressors to the currently active estimates (i.e.
the model fit last) .
. estadd beta: m1 m3
adds the standardized beta coefficients to the
estimates stored as "m1" and "m3".
. estadd coxsnell: *
adds the Cox & Snell R-squared to all
stored estimates.
Other changes:
o New functions -local-, -scalar-, and -matrix- are
available. They may be used to add results
returned by other commands. For example,
. regress price mpg weight
. test mpg = weight
. estadd scalar p_diff = r(p)
adds in e(p_diff) the p-value of the difference
between the coefficients of "mpg" and "weight".
o A new function -expb- is available. It adds in
-e(expb)- the exponents of the coefficients.
o -estadd_plus- is no longer a separate package. It
has been fully incorporated into -estadd-. Remove
-estadd_plus- from your system typing
. ado uninstall estadd_plus
o Functions that rely on e(sample) now abort with
error if e(sample) is not available.
ben
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